Method for producing a porous cementitious material

By reducing the alkalinity of silicate cement through calcination and ultrasonic activation of coal-series kaolin, and combining it with recycled aggregates and fertilizers, low-alkalinity silicate cement porous vegetation concrete is prepared. This solves the problems of limited raw material reserves and high alkalinity, and provides a low-cost material suitable for plant growth, which can be applied to slope protection and riverbank protection projects.

CN121573951BActive Publication Date: 2026-04-21INNER MONGOLIA UNIVERSITY
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Patent Information

Application Number
CN202610113928.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-28
Publication Date
2026-04-21
Estimated Expiration
2046-01-28

AI Technical Summary

Technical Problem

In the existing technology, sulfoaluminate cement is not suitable for preparing porous vegetation concrete due to its limited raw material reserves, high price, and the high alkalinity of silicate cement, which would affect the vegetation growth environment.

Method used

By calcining and ultrasonically activating coal-series kaolin at high temperature, combining it with silicate cement and recycled concrete aggregates, and adding an appropriate amount of fertilizer, a low-alkalinity silicate cement porous vegetation concrete material is prepared, which reduces alkalinity and improves the vegetation growth environment.

Benefits of technology

It enables plant growth in a neutral environment, providing a low-cost porous vegetation concrete material that combines mechanical properties and ecological functions. It solves the problems of limited raw material reserves and high alkalinity, and is suitable for projects such as slope protection and riverbank protection.

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Abstract

The application discloses a preparation method of a silicate cement porous vegetation concrete material, and comprises the following steps: calcining coal-based kaolin to obtain activated coal-based kaolin; adding the activated coal-based kaolin and a water reducing agent into mixing water, and performing ultrasonic dispersion to form an activated coal-based kaolin suspension; weighing silicate cement, concrete recycled aggregates and fertilizer, and uniformly mixing to form dry materials; uniformly mixing the activated coal-based kaolin suspension and the dry materials, and loading into a mold for forming; and performing film covering and curing. The application is free from the low-alkalinity porous vegetation concrete system of a sulphoaluminate cement used in the preparation of a porous vegetation concrete in the prior art, and utilizes the activated coal-based kaolin after calcination and ultrasonic treatment as a main alkali-reducing agent to reduce the alkalinity of the silicate cement according to the condition that coal-based kaolin resources are rich, and the activated coal-based kaolin is matched with the fertilizer and the concrete recycled aggregates to provide a new material with rich raw material sources and low cost for ecological protection of a slope and a bank.
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